I have two favorite poetic forms: Free Verse and Blank Verse.

Free verse allows me to express myself effectively because of the 'freedom' to use whatever literary devices I desire.

However, I also find Blank Verse allows me to express myself effectively because of the constraints it imposes on me. I agree with the above post - I also enjoy the challenge of creating according to a prescribed pattern - in the case of Blank Verse, Iambic Pentameter.

It depends on the poem's topic and my frame of mind at the time of writing the original draft. Sometimes I need the free-for-all recipe that Free Verse lays out. Sometimes I need the structure and formality of Blank Verse to harness my thoughts into a cohesive story.

My favorite poetic form is the sonnet.  I like the challenge of fitting one’s thoughts and feelings into a pattern, but I admit I also love the history behind a sonnet.  They are classic love poetry, and used to be used by gentlemen to woo their ladies.

I love free verse. I think that the fact that the poet is not limited by rhyme, meter, counting of feet allows exactly what the poet wishes to convey to come out. One can be as formal or informal with language as they wish.

I would have to say free verse. Using free verse means that you can have emphasis wherever you choose, and capitalize on any of the linguistic features you choose. I would say that the variation within a recognised form suits me best.